The Truth Beneath
비밀은 없다 (original)
Starring Son Ye-jin, Kim Joo-hyuk, Choi Yu-hwa, Kim Min-jae, Park Jin-woo, Son Seong-chan, Kim Eui-sung, Shin Ji-Hoon, Kim So-hee, Ye Soo-jung
It's a drama and thriller movie, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Italy.